Rounding mechanism



Oct. 26 1926.

E. H. WILSON ROUNDING MECHANISM Filed Nov; 20. 1923 2 Sheets-Sheet 1 ONm II lm la T i p Oct. 26 1926. 1,604,543

' E. H. WILSQN ROUNDING MECHANISM Filed Nov. 20. 1923 2 Sheets-Sheet 2INVENTOR Patented (lot. 26, 1926.

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EDGAR H. WILSON, OF STOW'E TOWNSHIP, ALLEGHENY COUNTY," PENNSYLVANIA,AS-

SIGNOR 'IO TAYLOR-WILSON MANUFACTURING COMPANY, OF IVIGKEES ROCKS,PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

ROUNIDING- MECHANISM.

Application filed November 20, 1923. Serial No. 675,858.

The present invention relates broadly to the metal working art, and moreparticularly to rounding mechanism for use in connection with pipethreading machines.

It is customary to provide a pipe thread ing machine with means forrounding the ends of the pipes so as to make them truly cylindricalpreparatory to cutting the threads thereon. This rounding mechanismusually comprises a rounding die consist-- ing of upper and lowerrounding blocks, the

lower block being stationary and the upper block having operating meansassociated therewith for causing the same to approach and recede fromthe lower block. The threading machine is usually provided with arotatable barrel in which each pipe to be operated upon-is inserted, andin which it is supported during the rounding opera tion, as well asduring the threading operation.

An objection to a rounding mechanism of this character is that when thetwo blocks are separated by moving the upper block away from the lowerblock, and the pipe is pushed through the barrel of the threadingmachine so as to position the portion thereof to be rounded between theblocks, if the end of the pipe is badly distorted, it is apt to strikeagainst the stationary lower block. Another objection to a roundingmechanism in which only the upper block is movable is that the twoblocks are worn unevenly.

By the present invention these objectionable features are avoided by theprovision of a rounding mechanism in which both blocks of the roundingdie are moved towards and from'each other.

Another feature of the invention resides in the provision of means foradjusting the path of movement of each of the rounding blocks.

Still another feature of the invention is the provision of a floatingsupport for the rounding die and the adjusting and operating meansassociated therewith.

In the accompanying drawings, there is shown, for purposes ofillustration only, one embodiment of the present invention, it beingunderstood that the drawings do not define the limits of the invention,as changes may be made in the construction. and opera tion thereindisclosed without departing from the spirit of the invention or scope ofmy broader claims.

In the drawings Figure 1 is a front elevation of a round ing mechanismembodying my invention, the cover plate being removed;

Fig. 2 is a view corresponding to Fig 1 with the cover plate inposition, and

Fig. 3 is aside elevation of the structure shown in Fig. 2.

Referring to the drawings, the rounding mechanism comprises a carriage 2having oppositely facing channels 3 adapted to receive ribs on athreading machine, whereby the carriage is held in position on themachine. This carriage is provided with oppositely facing upper andlower hori- Zontal channels 4 and 5 receiving the upper and lower edgeportions of a support 6 for the rounding die and the operating meanstherefor. Positioned in the channels 5, and interposed between the loweredge of the support 6 and the base 7 of the carriage 2, are a pluralityof coil springs 8, whereby the support 6 is yieldingly held awayfronrthe base 7. The support 6 therefore constitutes a floating supportfor the roundmeans. This is .an advantageous feature of theconstruction, in that the floatmg support is permitted to have a slightbodily movement, both in a vertical direction and n a horizontaldirectlon, thereby preventing undue strain upon the parts during therounding operations.

A pair of opposite rounding block holders 9 are pivoted at one end uponpivot pins 10 carried by nuts 11. These nuts are in engagement with aright and left screw 12, which is ournaled in bearings 13 on the support6, and is provided at its upper end with an operating handle 14. Atoggle 15 is pivotally connected at one end to the opposite end of eachholder 9, each of said toggles being pivoted at its opposite end upon apin 16 carried by the support 6. The toggles are connected by parallellinks 17 with a cross-head 18 carried by the piston rod 19 of a pistonworking in a fluid pressure cylinder 20.

The support 6 is provided with a covet 'ing die and its adjusting andoperating plate 21 held in position thereon by bolts 22 and nuts 23, thebolts being carried by the support and projecting through openings inthe cover plate, The pivot pins 16 for the toggles 15 also projectthrough open ingsin the c ver plate,"and cotter pins 24 are. insertedthrough openings in the outer ends of said pins, said cotter. pinscooperating with the nuts 23 to hold the cover plate in position. Acutter 25 for cutting ott the ends of the pipes is mounted upon ahorizontally adjustable slide 26"carried by the cover plate. i P i Therounding block holders 9 are provided with U-shaped channels to receiveupper and lower rounding blocks 27 of the rounding die having opposedarcuate rounding surfaces 28. The upper rounding block may be held inposition by any'suitable means. and different sizes of"rounding blocksmay be provided so that any desired size of blocks may be positioned inthe holders, depending upon the size of pipe to be operated upon. In theoperation of the rounding mecha nism, the hand wheel 14 will be turnedto adjust-the positions of the nuts 11, so that when the toggles 15 arestraightened, as shown in Fig. 1, the upper and lower blocks will becaused to'move towards each'other the required distance to effect theclosing of the die to eflfect the engagement of the arcuate roundingfsurfaces 28 with the pipe to be rounded. Pressure fluid will then beadmitted into one end of the fluid pressure cylinder 20, was tocauseoutward movement of the piston rod 19 and the cross-head 18 carriedthereby. This outward movement of the cross-head 18 will effect, throughthe links 17 breakingot the toggles 15 and consequently the opening'ofthe die. The end of the pipe to be operated upon will then be insertedbetween the rounding blocks and pressure fluid admitted to the oppositeend of the cylinder 20 to cause inward movement of the piston rod 19 tothereby effect a straightening of the 'toggleslfito close the die andbring the rounding blocks into engagement with the pipe. .Rotation ofthe p pe will then be efl'ected inthe usual manner. The desired pressureof the rounding blocks may bemainta-ined upon'the rotating pipebyturning the hand wheel 14.

' Theadvantages of the invention arise from the provisionot a roundingmechanism in which the upper and lower rounding blocks are both movable,andin'kwhich means is provided toradjusting the path of movement ofJeachot said blocks;

Further advantages of the invention arise froin'the provision of afloating support for the rounding die, which permits the rounding die tohave a substantially universal movement in a plane normal to thelongitudinal axis of the pipe being rounded, whereby the severe strainswhich are imposed upon the bed plate and carriage of the usual type ofrounding mechanism during the rounding of a pipe, are avoided.

While I have shown and described a rounding mechanism in which bothrounding blocks are pivotally mounted, and each actuatedby a toggle, itwill be apparent that it may be desirable in certain cases to haveone-of the rounding blocks stationary and the other pivotally mounted,with provision for adjustmentof its pivot, and operated either by a cam,eccentric, toggle or other well known form ofoperating and lockingmeans. Such a construction is within the purview of the appended claims.'1

I claim:

1. Rounding mechanism comprising a pluralityof pivoted rounding blocks,means for simultaneously adjustingthe-pivots of all of the blocks inaplane' normal to the axes of the pivots and the article tobe rounded,and other means for sin'iultaneously moving all of the blocks in saidplane, to move the said blocks into'and out of operative position,substantially as described.

2. Rounding mechanism comprising a plurality of pivoted rounding blocks,means for simultaneously adjusting all of the pivots of the blocks ina-plane normal to the axis of the article-to be rounded, and a pair oftogglel levers foreac-h block for simultaneously moving all of theblocks in said plane,to move the said blocks into and out 0 5 operativeposition, substantially as described. "3'. Roundinganechanism comprisingtwo cooperating pivoted IOtllltlillgblGClCS, means for moving both ofsaid blocks toward and from 'each othe'r in a plane normal to the axisotthe'arti'cle to be" rounded to effect movement thereof into and out ofoperative position, and means at the pivoted ends for simultaneouslyadjusting the path of travel of both of said blocks about the axis ofthe articleto be rounded,substantially as described.

4L Ptounding mechanism comprising a plurality'ol' cooperating roundingblocks, atleast one of said blocks being; pivotally mountedabout an'axissubstantially parallel to the axis of the article tobe rounded, meansforadjusting the air-is ofsaid block toward and fromthe axis o'fthearticle, and means for rocking said block about its pivotal mounting toeffect the movement thereof in a plane'normal to the axis of the articleto he roundedto move said block into and out of operative position,"substantially as described; i

5. Bounding mechanism comprising a plurality-of cooperating roundingblocks at least one of "said blocks being pivotally mounted about anaxis substantially parallel to the axisof the article t'obe rounded,means tor adjusting the axis of said block which" is not straight,

toward and from the ZLXlS of the article, and toggle means for rockingsaid block about its pivotal mounting to effect movement thereof in aplane normal to the axis of the article to be rounded to move said blockinto and out of operative position, substantially as described.

6. Rounding mechanism, comprising a rounding die consisting of a pair ofoppositely facing rounding blocks, each of said blocks being pivotallymounted, means for rocking said blocks about their pivotal axes toeffect movement thereof towards and from each other, and means forsimultaneously adjusting the positions of the pivots of said blocks tothereby vary the extent to which the die is closed when actuated by saidfirst mentioned means, substantially as described.

7. Rounding mechanism, comprising a rounding die consisting of a pair ofoppositely facing rounding blocks, each of said blocks being pivotallymounted at one end, means for simultaneously adjusting both of saidpivots, a toggle connected to the opposite end of each block, and meansfor simultaneously actuating said toggles to effect movement of saidblocks towards and from each other, substantially as described.

8. Rounding mechanism, comprising a rounding die consisting of a pair ofoppositely facing rounding blocks, each of said blocks being pivotallymounted at one end, a toggle connected to the opposite end of eachblock, means for simultaneously actuating said toggles to effectmovement of said blocks towards and from each other, and means formoving the pivots of said blocks towards and from each other to therebyshift the paths of travel of said blocks when actuated by said firstmentioned means, substantially as described. a

9. Pipe rounding mechanism, comprising a floating carriage, a support onthe carriage adapted to be moved by the pipe during the rounding, aplurality of cooperating blocks carried by said support, and means otherthan the support for effecting relative movement of said blocks towardsand from each other, substantially as described.

10. Rounding mechanism, comprising a plurality of cooperating roundingblocks, means for actuating said blocks to effect movement thereof intoand out of operative position, a carriage and a support for said blocksslidcbly mounted on the carriage for permitting universal movementthereof in a plane substantially normal to the axis of the materialbeing rounded, substantially as described.

11. Rounding mechanism comprising a plurality of cooperating roundingblocks, a support, at least, one of said blocks being pivotally mountedon the support, means for rocking said block about its pivotal mountingto effect movement thereof into and out of operative position,a-carriage, and connecting means between the support and carriage forpermitting universal movement of said blocks andsupport relative to thecarriage in a plane substantially normal to the axis of the materialbeing rounded, substantially as described.

12. Pipe rounding mechanism comprising a carriage, a support fioatablymounted on the carriage to permit movement of the support on thecarriage in a plane normal to the axis of the pipe being rounded, asplit die formed of two blocks, a nut pivotally connected to one end ofeach block, a screw mounted on the support engaging the nuts forsimultaneously adjusting one end of each block, and means mounted on thesupport and connected to the opposite ends of the books for moving theblocks toward and from each other, substantially as described. 13. Piperounding mechanism comprising a carriage, a support floatably mounted onthe carriage to permit movement of the sup port on the carriage in aplane normal to the axis of the pipe being rounded, a split die formedof two blocks, a nut pivotally connected to one end of each block, ascrew mounted on the support engaging the nuts for simultaneouslyadjusting one end of each block, toggle lever mechanism mounted on thesupport and connected to the opposite ends of each of the blocks, andfluid pressure means mounted on the support and con- 'nected to thetoggle lever mechanism for moving the blocks toward and from each other,substantially as described.

14. Rounding mechanism, comprising a plurality of cooperating roundingblocks, at least one of said blocks being pivotally mounted, means forrocking said block about its pivotal mounting to effect movement thereofinto and out of operative position, means for changing the position ofthe pivotal axis of said block toward and from the other block totherebyshift the path of.

travel thereof when actuated by said first mentioned means, andsupporting means for said blocks permitting substantially univer salmovement thereof in a plane substantially normal to the axis of thematerial being rounded, substantially as described.

15. In a pipe rounding machine, a carriage, a floating support mountedon the carriage, a rounding die carried by the support, and die openingand closing means carried entirely by the support for moving the dierelative to the support and the pipe to be rounded, whereby the die isfree to move with the pipe to a limited extent relative to the supportin any direction normal to the axis of the pipe during the roundingoperation without affecting the opening and closing means, substantiallyas described.

16. In a pipe rounding machine, ,a carriage, a floating support mountedon the can '41; moa s riage, a rounding die carried by the support, tentrelative to the support in any direction hand operated means for openingand C1osnormal to the axis of the pipe during the 10 ing the die carriedby the support, and rounding operation Without afieoting the poweroperated die opening and closing opening and closing means,substantially as means carried entirely by the support for described.

moving thedie relative ,to the support and In testimony whereof I havehereunto set the pipe to be rounded, whereby the die is my hand.

free to move with the pipe to a limited eX- EDGAR H. WILSON.

